HC5A Hull Anode – AluminumPerformance Metals Navalloyaluminum anodes are manufactured to the military specification MIL-DTL 24779 and are suitable for use in all water types- salt, brackish, or fresh.The anode includes the exclusive, patented red spot wear indicator.Replaces:ZHC-5 Specifications:Material: AluminumBox Dimensions: 1″H x 4″W x 8″L WT: 1.3 lbsUPC: 870648001376